ABB Relion 670 Series RES670, Technical Manual

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Section 3 Analog inputs
3.1 Introduction
Analog input channels must be configured and set properly in order to get correct
measurement results and correct protection operations. For power measuring and all
directional and differential functions the directions of the input currents must be defined
in order to reflect the way the current transformers are installed/connected in the field
( primary and secondary connections ). Measuring and protection algorithms in the IED
use primary system quantities. Setting values are in primary quantities as well and it is
important to set the data about the connected current and voltage transformers properly.
A reference PhaseAngleRef can be defined to facilitate service values reading. This analog
channels phase angle will always be fixed to zero degrees and all other angle information
will be shown in relation to this analog input. During testing and commissioning of the
IED the reference channel can be changed to facilitate testing and service values reading.
The availability of VT inputs depends on the ordered transformer input
module (TRM) type.
3.2 Function block
The hardware channels appear in the signal matrix tool (SMT) and in ACT
when a TRM is included in the configuration with the hardware
configuration tool. In the SMT or the ACT they can be mapped to the
desired virtual input (SMAI) of the IED and used internally in the
configuration.
1MRK 511 365-UUS A
Section 3
Analog inputs
Phasor measurement unit RES670 2.1 ANSI 55
Technical manual